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// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/core/layout/ng/layout_ng_fieldset.h"
#include "third_party/blink/renderer/core/layout/layout_object_factory.h"
#include "third_party/blink/renderer/core/paint/ng/ng_box_fragment_painter.h"
namespace blink {
LayoutNGFieldset::LayoutNGFieldset(Element* element)
: LayoutNGBlockFlow(element) {
SetChildrenInline(false);
}
void LayoutNGFieldset::AddChild(LayoutObject* new_child,
LayoutObject* before_child) {
LayoutBlock* fieldset_content = To<LayoutBlock>(FirstChild());
if (!fieldset_content) {
// We wrap everything inside an anonymous child, which will take care of the
// fieldset contents. This parent will only be responsible for the fieldset
// border and the rendered legend, if there is one. Everything else will be
// done by the anonymous child. This includes display type, multicol,
// scrollbars, and even padding. Note that the rendered legend (if any) will
// also be a child of the anonymous object, although it'd be more natural to
// have it as the first child of this object. The reason is that our layout
// object tree builder cannot handle such discrepancies between DOM tree and
// layout tree. Inserting anonymous wrappers is one thing (that is
// supported). Removing it from its actual DOM siblings and putting it
// elsewhere, on the other hand, does not work well.
scoped_refptr<ComputedStyle> new_style =
ComputedStyle::CreateAnonymousStyleWithDisplay(StyleRef(),
EDisplay::kFlowRoot);
// TODO(crbug.com/875235): When the paint code is ready for anonymous
// scrollable containers, inherit overflow-x and overflow-y here.
new_style->SetPaddingTop(StyleRef().PaddingTop());
new_style->SetPaddingRight(StyleRef().PaddingRight());
new_style->SetPaddingBottom(StyleRef().PaddingBottom());
new_style->SetPaddingLeft(StyleRef().PaddingLeft());
if (StyleRef().SpecifiesColumns()) {
new_style->SetColumnCount(StyleRef().ColumnCount());
new_style->SetColumnWidth(StyleRef().ColumnWidth());
} else {
new_style->SetHasAutoColumnCount();
new_style->SetHasAutoColumnWidth();
}
new_style->SetColumnGap(StyleRef().ColumnGap());
new_style->SetColumnFill(StyleRef().GetColumnFill());
new_style->SetFlexDirection(StyleRef().FlexDirection());
new_style->SetJustifyContent(StyleRef().JustifyContent());
// TODO(mstensho): Inherit all properties listed here:
// https://html.spec.whatwg.org/C/#the-fieldset-and-legend-elements
fieldset_content = LayoutBlock::CreateAnonymousWithParentAndDisplay(
this, new_style->Display());
fieldset_content->SetStyle(std::move(new_style));
LayoutBox::AddChild(fieldset_content);
}
fieldset_content->AddChild(new_child, before_child);
}
// TODO(mstensho): Should probably remove the anonymous child if it becomes
// childless. While an empty anonymous child should have no effect, it doesn't
// seem right to leave it around.
bool LayoutNGFieldset::IsOfType(LayoutObjectType type) const {
return type == kLayoutObjectNGFieldset || LayoutNGBlockFlow::IsOfType(type);
}
void LayoutNGFieldset::Paint(const PaintInfo& paint_info) const {
// TODO(crbug.com/988015): This override should not be needed when painting
// fragment is enabled in parent classes.
if (!RuntimeEnabledFeatures::LayoutNGFragmentPaintEnabled()) {
if (const NGPhysicalBoxFragment* fragment = CurrentFragment()) {
NGBoxFragmentPainter(*fragment, PaintFragment()).Paint(paint_info);
return;
}
}
LayoutNGBlockFlow::Paint(paint_info);
}
} // namespace blink
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